Assessment of a density modify based turbulence closure for unsteady cavitating flows

To assess a density modify based turbulence model, the unsteady cloud cavitating flow around a Clark-y hydrofoil is investigated by coupled experimental and numerical methods. A high speed camera is used to visualize the flow structures, and laser Doppler velocity (LDV) is employed for velocity measurement. The numerical simulations are conducted on the two dimensional hydrofoil section, the different turbulence models including the density modify based turbulence model are used for computation. It is shown that the new model can predict successively the characteristic of cavitation and the detail process of the cavitation shedding through adjusting the eddy viscosities. The average flow velocity values accord basically with the experimental results.